Surprisingly, you can! But it has to be a sitewide coupon (not their 20% off $25 coupon that only works with select sellers and items). Those sitewide ones been pretty awesome for me. I actually add items to my cart now and wait until the next one comes around..they're usually $10 off $50, $15 off $75, or if you're lucky, $20 off $100. It also doesn't matter which seller or category you buy from, so it will work, but the trick is paying for the item while the coupon is still live.
Since they only last about a day, you'd have to make sure the auction ends BEFORE the coupon expires so that you're able to complete your purchase in that window of time. In case you can't find an item that ends in time, eBay coupons work on "Buy It Now" items, too. Even if you have to pay a little more to qualify for the discount, it's worth it.
posted by DealiciousPie Jul 24, 2017